diff --git a/lesson_06/expression/src/expression_calculator.ts b/lesson_06/expression/src/expression_calculator.ts
index 13cb2ca05..dc9221935 100644
--- a/lesson_06/expression/src/expression_calculator.ts
+++ b/lesson_06/expression/src/expression_calculator.ts
@@ -2,10 +2,36 @@ export class ExpressionCalculator {
   /** Returns the calculation of ((a + b) * c) / d^e */
   calculate(a: number, b: number, c: number, d: number, e: number): number {
     // Implement your code here to return the correct value.
-    return 0;
+    const sum = this.add(a, b)
+    /* First step of PEMDAS in equation (Parenthesis)*/
+    const product = this.multiply(sum, c)
+    /* Second step of PEMDAS in equation (Parenthesis)*/
+    const power = Math.pow(d, e)
+    /* Third step of PEMDAS in equation (Exponent)*/
+    const quotient = this.divide(product, power)
+     /* Fourth and final step of PEMDAS in equation [Multiplication/Division(left to right)]*/
+    const result = quotient
+    /* Defines final result */
+    return result;
+    /* prints final result*/ 
   }
 
+  add(Augend: number, Addend: number,): number {
+    /* defines value of Augend and Addend; defines their return value*/
+    return Augend + Addend;
+    /* defines the function 'add'*/
+  }
+  multiply(Multiplicand: number, Multiplier: number): number {
+    /* defines value of Multiplicand and Multiplier; defines their return value*/
+    return Multiplicand * Multiplier; 
+    /* defines the function 'multiply'*/
+  }
+  divide(Dividend: number, Divisor: number): number {
+    /* defines value of Dividend and Divisor; defines their return value*/
+    return Dividend / Divisor; 
+    /* defines the function 'divide'*/
+  }
   pow(base: number, exponent: number): number {
     return Math.pow(base, exponent);
   }
-}
+}
\ No newline at end of file
diff --git a/lesson_06/expression/tsconfig.json b/lesson_06/expression/tsconfig.json
index ced0628a9..96d7f3f58 100644
--- a/lesson_06/expression/tsconfig.json
+++ b/lesson_06/expression/tsconfig.json
@@ -111,4 +111,4 @@
     "skipLibCheck": true /* Skip type checking all .d.ts files. */
   },
   "exclude": ["node_modules", "build"]
-}
+}
\ No newline at end of file